Steel Beam Sizes / AISC / HSS Rectangular / HSS 18x8x1/4

HSS 18x8x1/4 Steel Beam Dimensions and Properties

AISC Rectangular HSS · v16.0

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Diagram, properties emphasis, and nearby alternatives use the selected unit system.

Units

Section diagram

HSS 18x8x1/4 dimensions

Not to scale. Dimensions shown for reference.

Section properties

Symbols match the steel section finder. Imperial and metric values are shown side by side.

Property Imperial Metric
Weight 42.84 lb/ft 63.80 kg/m
Height 18.00 in 457.00 mm
Width 8.00 in 203.00 mm
Nominal tw 0.250 in 6.350 mm
Design tw 0.233 in 5.920 mm
Area 11.80 in² 7,610.00 mm²
Ix 492.00 in⁴ 205,000,000 mm⁴
Iy 141.00 in⁴ 58,700,000 mm⁴
Sx 54.70 in³ 896,000.00 mm³
Sy 35.20 in³ 577,000.00 mm³
Zx 67.70 in³ 1,110,000 mm³
Zy 38.60 in³ 633,000.00 mm³
rx 6.47 in 164.00 mm
ry 3.46 in 87.90 mm
J 351.00 in⁴ 146,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 18x8x1/4.

Lighter in Rectangular HSS

HSS 10x8x3/8

Weight
42.8 lb/ft (-0.1%)
Depth
10.00 in (-44%)
Ix
169.0 in⁴ (-66%)

Heavier in Rectangular HSS

HSS 12x10x5/16

Weight
44.6 lb/ft (+4.1%)
Depth
12.00 in (-33%)
Ix
264.0 in⁴ (-46%)

Closest Iₓ in Rectangular HSS

HSS 14x8x1/2

Weight
69.3 lb/ft (+62%)
Depth
14.00 in (-22%)
Ix
487.0 in⁴ (-1.0%)
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Source: AISC Shapes Database v16.0 · Methodology